U.S. patent application number 15/294963 was filed with the patent office on 2017-04-20 for switch wire connection device.
The applicant listed for this patent is SWITCHLAB INC., SWITCHLAB (SHANGHAI) CO., LTD.. Invention is credited to CHERNG SHIN WU, CHIH-YUAN WU.
Application Number | 20170110267 15/294963 |
Document ID | / |
Family ID | 57153382 |
Filed Date | 2017-04-20 |
United States Patent
Application |
20170110267 |
Kind Code |
A1 |
WU; CHIH-YUAN ; et
al. |
April 20, 2017 |
SWITCH WIRE CONNECTION DEVICE
Abstract
A switch wire connection device has a simplified structure and
is easy to operate with enhanced stability of operation. The switch
wire connection device includes a conductive component mounted in
an insulation case, a switch pushbutton assembled with the
conductive component and an electrical contact. The electrical
contact has a restriction unit and a contact plate connected with
the restriction unit. By means of operating the pushbutton, the
conductive component is driven to selectively electrically contact
or separate from the contact plate. The restriction unit defines a
space, in which a metal leaf spring is assembled. The wiring
circuit or conductive wire of a machine or equipment can be easily
directly plugged into the space of the restriction unit and held by
the metal leaf spring. The metal leaf spring is prevented from
deflecting in the operation process.
Inventors: |
WU; CHIH-YUAN; (NEW TAIPEI
CITY, TW) ; WU; CHERNG SHIN; (NEW TAIPEI CITY,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SWITCHLAB INC.
SWITCHLAB (SHANGHAI) CO., LTD. |
NEW TAIPEI CITY
SHANGHAI CITY |
|
TW
CN |
|
|
Family ID: |
57153382 |
Appl. No.: |
15/294963 |
Filed: |
October 17, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H01R 4/4827 20130101;
H01R 9/2433 20130101; H01H 1/5844 20130101; H01H 13/14 20130101;
H01H 1/20 20130101 |
International
Class: |
H01H 13/14 20060101
H01H013/14; H01H 1/58 20060101 H01H001/58; H01H 1/20 20060101
H01H001/20 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 19, 2015 |
TW |
104216729 |
Oct 20, 2015 |
TW |
104134448 |
Claims
1. A switch wire connection device comprising an insulation case
and a switch pushbutton assembled with the insulation case, the
case having a cavity for receiving the switch pushbutton, the
switch pushbutton being assembled with a conductive component and a
spring, the case being formed with wire sockets in communication
with the cavity, an electrical contact being disposed in the cavity
of the case, the electrical contact having a restriction unit and a
contact plate connected with the restriction unit, the contact
plate having a first end and a second end, the first end being
connected with the restriction unit, the switch pushbutton serving
to control the conductive component into electrical contact with
the second end of the contact plate or separation from the second
end of the contact plate, the restriction unit being formed with a
space for receiving a metal leaf spring, the metal leaf spring
including a first section and a second section, the first section
being connected with the restriction unit and together mounted in
the cavity of the case, the second section being swingably received
in the space of the restriction unit.
2. The switch wire connection device as claimed in claim 1, wherein
the restriction unit has a first side, a second side connected with
the first side, a third side connected with the second side and a
fourth side connected with the third side, the first, second, third
and fourth sides together forming a cuboidal frame structure having
the space, at least the second side and the fourth side together
helping in restricting the moving path of the metal leaf
spring.
3. The switch wire connection device as claimed in claim 2, wherein
the fourth side of the restriction unit is bent toward the first
side and extends to form a subsidiary side, the fourth side and the
subsidiary side containing an acute angle, a right angle or an
obtuse angle, the subsidiary side and the first side being
respectively formed with connection sections, which can be
connected with each other, the second and the fourth sides being
formed with rib sections.
4. The switch wire connection device as claimed in claim 2, wherein
the first end of the contact plate is connected with the first side
of the restriction unit, the second end being an inclined and
lifted structure and extending in a direction to contact the
conductive component, the rib section of the second side extending
in a direction from the first side to the third side and being
downward inclined, the rib section of the fourth side extending in
a direction from an upper side to the third side and being downward
inclined.
5. The switch wire connection device as claimed in claim 3, wherein
the first end of the contact plate is connected with the first side
of the restriction unit, the second end being an inclined and
lifted structure and extending in a direction to contact the
conductive component, the rib section of the second side extending
in a direction from the first side to the third side and being
downward inclined, the rib section of the fourth side extending in
a direction from an upper side to the third side and being downward
inclined.
6. The switch wire connection device as claimed in claim 2, wherein
the metal leaf spring is in the form of a V-shaped body having an
opening, the metal leaf spring including a bent section connected
between the first and second sections, the first section having a
head end and an assembling section assembled on an assembling
section of the third side of the restriction unit, whereby the
first section of the metal leaf spring is positioned in the
restriction unit, the head end of the first section of the metal
leaf spring and an upper end section of the third side of the
restriction unit being together fixed in a recess of the cavity of
the case, the bent section of the metal leaf spring being wound on
a stake in the cavity of the case, whereby the opening of the metal
leaf spring is directed to the conductive component and the second
section of the metal leaf spring extends into the restriction unit
and can swing within the restriction unit.
7. The switch wire connection device as claimed in claim 3, wherein
the metal leaf spring is in the form of a V-shaped body having an
opening, the metal leaf spring including a bent section connected
between the first and second sections, the first section having a
head end and an assembling section assembled on an assembling
section of the third side of the restriction unit, whereby the
first section of the metal leaf spring is positioned in the
restriction unit, the head end of the first section of the metal
leaf spring and an upper end section of the third side of the
restriction unit being together fixed in a recess of the cavity of
the case, the bent section of the metal leaf spring being wound on
a stake in the cavity of the case, whereby the opening of the metal
leaf spring is directed to the conductive component and the second
section of the metal leaf spring extends into the restriction unit
and can swing within the restriction unit.
8. The switch wire connection device as claimed in claim 5, wherein
the metal leaf spring is in the form of a V-shaped body having an
opening, the metal leaf spring including a bent section connected
between the first and second sections, the first section having a
head end and an assembling section assembled on an assembling
section of the third side of the restriction unit, whereby the
first section of the metal leaf spring is positioned in the
restriction unit, the head end of the first section of the metal
leaf spring and an upper end section of the third side of the
restriction unit being together fixed in a recess of the cavity of
the case, the bent section of the metal leaf spring being wound on
a stake in the cavity of the case, whereby the opening of the metal
leaf spring is directed to the conductive component and the second
section of the metal leaf spring extends into the restriction unit
and can swing within the restriction unit.
9. The switch wire connection device as claimed in claim 6, wherein
the assembling section of the first section of the metal leaf
spring is a perforation and the assembling section of the third
side of the restriction unit is a raised section, two electrical
contacts being disposed in the cavity of the case, the second and
fourth sides of the restriction unit being formed with notches for
leaning on a shoulder section formed in the cavity of the case.
10. The switch wire connection device as claimed in claim 7,
wherein the assembling section of the first section of the metal
leaf spring is a perforation and the assembling section of the
third side of the restriction unit is a raised section, two
electrical contacts being disposed in the cavity of the case, the
second and fourth sides of the restriction unit being formed with
notches for leaning on a shoulder section formed in the cavity of
the case.
11. The switch wire connection device as claimed in claim 8,
wherein the assembling section of the first section of the metal
leaf spring is a perforation and the assembling section of the
third side of the restriction unit is a raised section, two
electrical contacts being disposed in the cavity of the case, the
second and fourth sides of the restriction unit being formed with
notches for leaning on a shoulder section formed in the cavity of
the case.
12. The switch wire connection device as claimed in claim 2,
wherein the restriction unit and the contact plate are formed as an
integrated structure, the first end of the contact plate being
integrally connected with the first side of the restriction
unit.
13. The switch wire connection device as claimed in claim 3,
wherein the restriction unit and the contact plate are formed as an
integrated structure, the first end of the contact plate being
integrally connected with the first side of the restriction
unit.
14. The switch wire connection device as claimed in claim 2,
wherein the second end of the contact plate of the electrical
contact is bent toward the space of the restriction unit and
extends to form a subsidiary end, the second end and the subsidiary
end containing an acute angle, a right angle or an obtuse angle,
the subsidiary end being further bent toward the conductive
component and extends to form a tail end, the subsidiary end and
the tail end containing an acute angle, a right angle or an obtuse
angle, the switch pushbutton being operable to drive the conductive
component into electrical contact with the tail end of the second
end of the contact plate to power on or separation from the tail
end of the second end of the contact plate to power off.
15. The switch wire connection device as claimed in claim 3,
wherein the second end of the contact plate of the electrical
contact is bent toward the space of the restriction unit and
extends to form a subsidiary end, the second end and the subsidiary
end containing an acute angle, a right angle or an obtuse angle,
the subsidiary end being further bent toward the conductive
component and extends to form a tail end, the subsidiary end and
the tail end containing an acute angle, a right angle or an obtuse
angle, the switch pushbutton being operable to drive the conductive
component into electrical contact with the tail end of the second
end of the contact plate to power on or separation from the tail
end of the second end of the contact plate to power off.
16. The switch wire connection device as claimed in claim 5,
wherein the second end of the contact plate of the electrical
contact is bent toward the space of the restriction unit and
extends to form a subsidiary end, the second end and the subsidiary
end containing an acute angle, a right angle or an obtuse angle,
the subsidiary end being further bent toward the conductive
component and extends to form a tail end, the subsidiary end and
the tail end containing an acute angle, a right angle or an obtuse
angle, the switch pushbutton being operable to drive the conductive
component into electrical contact with the tail end of the second
end of the contact plate to power on or separation from the tail
end of the second end of the contact plate to power off.
17. The switch wire connection device as claimed in claim 7,
wherein the second end of the contact plate of the electrical
contact is bent toward the space of the restriction unit and
extends to form a subsidiary end, the second end and the subsidiary
end containing an acute angle, a right angle or an obtuse angle,
the subsidiary end being further bent toward the conductive
component and extends to form a tail end, the subsidiary end and
the tail end containing an acute angle, a right angle or an obtuse
angle, the switch pushbutton being operable to drive the conductive
component into electrical contact with the tail end of the second
end of the contact plate to power on or separation from the tail
end of the second end of the contact plate to power off.
18. The switch wire connection device as claimed in claim 8,
wherein the second end of the contact plate of the electrical
contact is bent toward the space of the restriction unit and
extends to form a subsidiary end, the second end and the subsidiary
end containing an acute angle, a right angle or an obtuse angle,
the subsidiary end being further bent toward the conductive
component and extends to form a tail end, the subsidiary end and
the tail end containing an acute angle, a right angle or an obtuse
angle, the switch pushbutton being operable to drive the conductive
component into electrical contact with the tail end of the second
end of the contact plate to power on or separation from the tail
end of the second end of the contact plate to power off.
19. The switch wire connection device as claimed in claim 11,
wherein the second end of the contact plate of the electrical
contact is bent toward the space of the restriction unit and
extends to form a subsidiary end, the second end and the subsidiary
end containing an acute angle, a right angle or an obtuse angle,
the subsidiary end being further bent toward the conductive
component and extends to form a tail end, the subsidiary end and
the tail end containing an acute angle, a right angle or an obtuse
angle, the switch pushbutton being operable to drive the conductive
component into electrical contact with the tail end of the second
end of the contact plate to power on or separation from the tail
end of the second end of the contact plate to power off.
20. The switch wire connection device as claimed in claim 1,
wherein the wire sockets are formed on lower end sections of two
sides of the case, whereby a conductive wire can be plugged through
each wire socket into the cavity of the case, the second section of
the metal leaf spring having a tail end for pressing the conductive
wire against the first end of the contact plate, the plug-in angle
of the conductive wire being equal to the inclination angle of the
first end of the contact plate, an operation hole being formed at a
lower end of the case in communication with the cavity and the
space of the restriction unit.
21. The switch wire connection device as claimed in claim 2,
wherein the wire sockets are formed on lower end sections of two
sides of the case, whereby a conductive wire can be plugged through
each wire socket into the cavity of the case, the second section of
the metal leaf spring having a tail end for pressing the conductive
wire against the first end of the contact plate, the plug-in angle
of the conductive wire being equal to the inclination angle of the
first end of the contact plate, an operation hole being formed at a
lower end of the case in communication with the cavity and the
space of the restriction unit.
22. The switch wire connection device as claimed in claim 3,
wherein the wire sockets are formed on lower end sections of two
sides of the case, whereby a conductive wire can be plugged through
each wire socket into the cavity of the case, the second section of
the metal leaf spring having a tail end for pressing the conductive
wire against the first end of the contact plate, the plug-in angle
of the conductive wire being equal to the inclination angle of the
first end of the contact plate, an operation hole being formed at a
lower end of the case in communication with the cavity and the
space of the restriction unit.
23. The switch wire connection device as claimed in claim 19,
wherein the wire sockets are formed on lower end sections of two
sides of the case, whereby a conductive wire can be plugged through
each wire socket into the cavity of the case, the second section of
the metal leaf spring having a tail end for pressing the conductive
wire against the first end of the contact plate, the plug-in angle
of the conductive wire being equal to the inclination angle of the
first end of the contact plate, an operation hole being formed at a
lower end of the case in communication with the cavity and the
space of the restriction unit.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to a switch wire
connection device, and more particularly to a switch wire
connection device including a restriction unit, a contact plate and
a metal leaf spring assembled with each other for directly
electrically connecting with a conductive wire. The restriction
unit has higher rigidity and is able to help in fixing the metal
leaf spring and restricting the moving path thereof.
[0003] 2. Description of the Related Art
[0004] A conventional switch wire connection device is a power
switch device capable of connecting circuits or conductive wires.
The switch wire connection device is installed on an operation
panel or distribution box of an electronic or electrical apparatus
for connecting the wiring circuits. The switch wire connection
device has an insulation case (generally made of plastic material)
and a conductive component enclosed in the insulation case and a
screw for locking the wiring circuits or conductive wires of the
electronic or electrical apparatus. By means of operating a switch
pushbutton, the conductive component is controlled to electrically
contact or separate from the wiring circuits or the conductive
wires so as to close the circuit to power on the electronic or
electrical apparatus or open the circuit to power off the
electronic or electrical apparatus.
[0005] With respect to operation, use and structural design of the
switch wire connection device, the insulation case is formed with
wire sockets and screw locking holes in communication with each
other. An operator can use a tool to drive the screw to lock a
conductive wire plugged into the wire socket. In practice, the
screw must be first positioned in the screw locking hole in a
loosened state, permitting the conductive wire to plug into the
wire socket. In the loosened state, the screw is often deflected.
Under such circumstance, it is troublesome and hard for the
operator to aim the tool at the screw to drive the screw for
locking the conductive wire with the electrical contact (or termed
electrical connection terminal).
[0006] To improve the above problem, there is a conventional switch
wire connection device in which the insulation case and the
electrical contact are formed with guide channels and guide ribs in
cooperation with the spring. Such structure is relatively
complicated so that the manufacturing cost is increased and
generally the volume of the case is enlarged to avoid interference
between the guide structures and the conductive component. The
increase of the volume of the case is unbeneficial to the
miniaturization of the switch wire connection terminal device and
fails to meet the trend to miniaturize the switch wire connection
terminal device.
[0007] Also, in some operation environments (such as the operation
of the machine or the equipment will cause vibration), after a long
term of use, the screw is apt to loosen. As a result, the
conductive wire may loosen and detach from the case. Especially,
when driving the screw mechanism to lock the conductive wires with
the electrical contact, it is necessary to use a tool for
tightening/untightening the screw. Such process is relatively
troublesome. This is not what we expect.
[0008] There is another conventional switch wire connection device
in which the case is designed with a specific internal structure
and an .alpha.-shaped metal leaf spring is applied to the case for
pressing the conductive wires instead of the screw mechanism.
However, as known by those who are skilled in this field, the
.alpha.-shaped metal leaf spring is manufactured by a special
bending process and it is necessary to form a mouth section on the
metal leaf spring for the other end of the metal leaf spring to
swingably pass through the mouth section for pressing the
conductive wire. The manufacturing process of the .alpha.-shaped
metal leaf spring is quite troublesome and complicated. This is not
what we expect.
[0009] To speak representatively, the conventional switch wire
connection device has some shortcomings in structural design and
operational form. To overcome the above shortcomings, it is
necessary to redesign the insulation case, the conductive
component, the electrical contact and the metal leaf spring and
change the use form of the switch wire connection device and widen
the application range thereof. For example, in the condition that
the volume of the switch wire connection device is not increased,
the switch wire connection device is redesigned to have a
simplified structure, which is easy to manufacture and operate. In
the conventional switch wire connection device, it is hard and
troublesome for an operator to aim the tool at the screw to drive
the screw for locking the conductive wire with the electrical
contact. In addition, it is troublesome to assemble the guide
channels and guide ribs of the insulation case and the electrical
contact and the spring. Also, an .alpha.-shaped metal leaf spring
is applied to the insulation case and the structure of the switch
wire connection device is complicated. After redesigned, all the
above shortcomings of the conventional switch wire connection
device are overcome. Moreover, without using any tool, an operator
can directly plug the conductive wires into the case to
electrically connect with the electrical contact. The electrical
contact has higher rigidity or hardness and good electrical
conductivity and is able to help in fixing the metal leaf spring
and restricting the moving path thereof. All these are not
substantially taught, suggested or disclosed in the conventional
switch wire connection devices.
SUMMARY OF THE INVENTION
[0010] It is therefore a primary object of the present invention to
provide a switch wire connection device, which has a simplified
structure and is easy to operate with enhanced stability of
operation. The switch wire connection device includes a conductive
component mounted in an insulation case, a switch pushbutton
assembled with the conductive component and an electrical contact.
The electrical contact has a restriction unit and a contact plate
connected with the restriction unit. By means of operating the
pushbutton, the conductive component is driven to selectively
electrically contact or separate from the contact plate. The
restriction unit defines a space, in which a metal leaf spring is
assembled. The wiring circuit or conductive wire of a machine or
equipment can be easily directly plugged into the space of the
restriction unit and held by the metal leaf spring. In addition,
during the operation process, the metal leaf spring is prevented
from deflecting.
[0011] In the above switch wire connection device, the restriction
unit and the contact plate are formed as an integrated structure.
The restriction unit has a first side, a second side connected with
the first side, a third side connected with the second side and a
fourth side connected with the third side. The first, second, third
and fourth sides together form a frame structure having the space
for receiving the metal leaf spring. At least the second side and
the fourth side serve to help in restricting the moving path of the
metal leaf spring. The contact plate has a first end and a second
end. The first end is connected with the first side of the
restriction unit. The second end is an inclined and lifted
structure and extends in a direction to contact the conductive
component. The present invention can be best understood through the
following description and accompanying drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a perspective exploded view of the present
invention, showing the structures of the case, the switch
pushbutton, the conductive component and the restriction unit and
contact plate of the electrical contact and the metal leaf
spring;
[0013] FIG. 2 is a sectional assembled view of the present
invention, showing the assembly of the case, the switch pushbutton,
the conductive component and the restriction unit and contact plate
of the electrical contact and the metal leaf spring;
[0014] FIG. 3 is a perspective exploded view of a preferred
embodiment of the present invention, showing that the restriction
unit and the contact plate are formed as an integrated
structure;
[0015] FIG. 4 is a perspective exploded view of another preferred
embodiment of the present invention, showing another embodiment of
the contact plate of the electrical contact; and
[0016] FIG. 5 is a sectional assembled view according to FIG. 4,
showing the assembly of the case, the switch pushbutton, the
conductive component, the conductive wires, the restriction unit
and contact plate of the electrical contact and the metal leaf
spring.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0017] Please refer to FIGS. 1 and 2. The switch wire connection
device of the present invention includes an insulation case 10 and
a switch pushbutton 20 assembled with the insulation case 10. The
case 10 has a cavity 11 for receiving the switch pushbutton 20. The
switch pushbutton 20 is assembled with a conductive component 30
and a spring 35. (This pertains to prior art and thus will not be
further described hereinafter). According to the direction of FIGS.
1 and 2, the lower end sections of two sides of the case 10 are
formed with wire sockets 12 in communication with the cavity 11.
The wiring circuits or conductive wires 90 of an electronic or an
electrical apparatus can be plugged through the wire sockets 12
into the cavity 11 to connect with the electrical contact 40.
[0018] As shown in the drawings, there are two electrical contacts
40 disposed in the cavity 11 of the case. Each electrical contact
40 includes a restriction unit 50 and a contact plate 60 connected
with the restriction unit 50. The restriction unit 50 is
selectively made of a plane-plate blank material with higher
rigidity or hardness, (such as iron or steel). The plane-plate
blank material is manufactured into the restriction unit 50 in the
form of a cuboidal frame structure as shown in FIG. 1 to be
assembled with the contact plate 60.
[0019] As shown in the drawings, the restriction unit 50 has a
first side 51, a second side 52 connected with the first side 51, a
third side 53 connected with the second side 52 and a fourth side
54 connected with the third side 53, which together form a cuboidal
frame structure having a space 55 for receive therein a metal leaf
spring 70. In addition, at least the second side 52 and the fourth
side 54 together help in restricting the moving path of the metal
leaf spring 70.
[0020] In this embodiment, the fourth side 54 is bent toward the
first side 51 and extends to form a subsidiary side 56. (For
example, the fourth side 54 and the subsidiary side 56 contain an
acute angle, a right angle or an obtuse angle). The subsidiary side
56 and the first side 51 are respectively formed with connection
sections 56a, 51a, which can be connected with each other. It
should be noted that the subsidiary side 56 and the first side 51
can be alternatively connected or fixed with each other by means of
insertion, latching, riveting, welding, etc. The second and the
fourth sides 52, 54 are formed with rib sections 52a, 54a for
increasing the structural strength of the restriction unit 50.
[0021] As shown in the drawings, the rib section 52a of the second
side 52 extends in a direction from the first side 51 to the third
side 53 and is downward inclined. The rib section 54a of the fourth
side 54 extends in a direction from the subsidiary side 56 to the
third side 53 and is downward inclined.
[0022] As shown in FIGS. 1 and 2, the contact plate 60 has a first
end 61 and a second end 62. The first end 61 is connected with the
first side 51 of the restriction unit. The second end 62 is an
inclined and lifted structure and extends in a direction to contact
the conductive component 30. The switch pushbutton 20 selectively
controls the conductive component 30 into electrical contact with
the second end 62 of the contact plate or separation from the
second end 62. To speak more specifically, when an operator presses
the switch pushbutton 20, the conductive component 30 is driven
into electrical contact with or separation from the contact plate
60 or the second end 62 thereof, whereby the electrical contact 40
is powered on or powered off.
[0023] As shown in the drawings, the metal leaf spring 70 is
substantially in the form of a V-shaped body having an opening. The
metal leaf spring 70 includes a first section 71, a second section
72 and a bent section 73 connected between the first and second
sections 71, 72. The first section 71 has a head end 74 and an
assembling section 75 in the form of a perforation. The assembling
section 75 can be assembled on an assembling section 53a in the
form of a raised section formed on the third side 53 of the
restriction unit, whereby the first section 71 of the metal leaf
spring is positioned in the space 55 of the restriction unit.
Moreover, the head end 74 of the first section 71 of the metal leaf
spring and an upper end section of the third side 53 of the
restriction unit are together fixed in a recess 13 of the cavity 11
of the case. The bent section 73 of the metal leaf spring is wound
on a stake 14 in the cavity 11 of the case, whereby the second
section 72 of the metal leaf spring extends into the space 55 of
the restriction unit and can swing within the space 55 of the
restriction unit.
[0024] In this embodiment, after the metal leaf spring 70 is
mounted in the cavity 11 of the case, the opening of the metal leaf
spring is directed to the conductive component 30. In this case,
the second section 72 is arranged in such an angle that the
conductive wire 90 can be easily plugged and assembled with the
case. Moreover, the plug-in direction or angle of the conductive
wire 90 is approximately equal to the inclination angle of the
first end 61 of the contact plate. Therefore, the conductive wire
90 can contact the first end 61 of the contact plate by larger area
than the conventional structure and get closer to the conductive
component 30. This enhances the electrical conduction efficiency
and assembling stability. Such structure is obviously different
from the a -shaped metal leaf spring or screw mechanism used in the
conventional technique for locking and connecting with the
conductive wire.
[0025] Referring to FIG. 2, after an operator directly plugs the
conductive wire 90 into the wire socket 12, the tail end 76 of the
second section 72 of the metal leaf spring presses the conductive
wire 90 against the first end 61 of the contact plate into
electrical contact therewith. At this time, the conductive
component 30 is positioned in a position in contact with the second
end 62 of the contact plate in a power-on state. When an operator
presses the switch pushbutton 20, the conductive component 30 is
moved downward according to the direction of the drawing, whereby
the conductive component 30 is separated from the second end 62 of
the contact plate into a power-off state.
[0026] Referring to FIGS. 1 and 2, the metal leaf spring 70 is such
received in the restriction unit 50 that at least the second side
52 and the fourth side 54 of the restriction unit together restrict
the moving path of the second section 72 of the metal leaf spring
so as to prevent the second section 72 from deflecting or swinging
to two sides. This helps in enhancing the stability of the move of
the metal leaf spring 70 and the assembling of the metal leaf
spring 70 with the conductive wire 90.
[0027] Especially, when plugging the conductive wire 90 into the
cavity 11 of the case and the space 55 of the restriction unit 50,
the conductive wire 90 will be restricted in the space 55 of the
restriction unit 50 with high hardness. Therefore, the bare metal
end of the conductive wire will not thrust or scrape and break the
case as happening in the conventional technique. Also, the
conductive wire will not swing within the interior of the case by
an excessively large angle or twist to stretch open the case due to
the operational environment, the operational situation (such as the
vibration caused by the operation of the machine or equipment) or a
collision due to negligence.
[0028] As shown by the phantom lines of FIG. 2, an operator can
extend a tool 80 from an operation hole 15 of lower end of the case
10 into the cavity 11 and the space 55 of the restriction unit to
push the second section 72 of the metal leaf spring and make the
tail end 76 of the second section leave the conductive wire 90.
Under such circumstance, the conductive wire 90 is released from
the pressing of the second section 72 of the metal leaf spring,
whereby the operator can directly detach the conductive wire 90
from the case 10.
[0029] In a modified embodiment, according to the configuration of
the cavity 11 of the case, the second and fourth sides 52, 54 of
the restriction unit 50 are formed with notches 52b, 54b for
leaning on a shoulder section 16 formed on the case 10 or the
cavity 11. Under such circumstance, the restriction unit 50 is more
securely assembled with the case 10.
[0030] Please now refer to FIG. 3. In a modified embodiment, the
restriction unit 50 and the contact plate 60 are formed as an
integrated structure. That is, the first end 61 of the contact
plate is integrally connected with the first side 51 of the
restriction unit.
[0031] Please now refer to FIGS. 4 and 5. In a modified embodiment
of the electrical contact 40, according to the assembling form of
the case 10 (or the cavity 11) and the switch pushbutton 20, the
second end 62 of the contact plate of the electrical contact 40 is
bent toward the space 55 of the restriction unit (or the lower side
of the drawing or the opening of the metal leaf spring 70) and
extends to form a subsidiary end 63. (For example, the second end
62 and the subsidiary end 63 contain an acute angle, a right angle
or an obtuse angle).
[0032] The subsidiary end 63 is further bent toward the conductive
component 30 or the switch pushbutton 20 and extends to form a tail
end 64. (For example, the subsidiary end 63 and the tail end 64
contain an acute angle, a right angle or an obtuse angle).
[0033] As shown in FIG. 5, after an operator operates the switch
pushbutton 20 to drive the conductive component 30 to move toward
the lower side of the drawing, the conductive component 30 will
contact the tail end 64 of the contact plate into a power-on state.
When the operator operates the switch pushbutton 20 to drive the
conductive component 30 to move toward the upper side of the
drawing, the conductive component 30 is separated from the tail end
64 of the contact plate into a power-off state.
[0034] To speak representatively, the switch wire connection device
of the present invention meets the trend to miniaturize the switch
wire connection terminal device without increasing the volume of
the case. In comparison with the conventional device, the switch
wire connection device of the present invention has the following
advantages: [0035] 1. The case 10, the switch pushbutton 20, the
conductive component 30, the restriction unit 50, the contact plate
60, the metal leaf spring 70 and the relevant components and
structures have been redesigned. For example, the restriction unit
50 has a first side 51, a second side 52, a third side 53, a fourth
side 54 and/or a subsidiary side 56, which together form a frame
structure having a space 55 for receiving the metal leaf spring 70.
The metal leaf spring 70 has a first section 71 inlaid or connected
with the third side 53 of the restriction unit. The bend section 73
is wound on the stake 14 of the case 10, whereby the second section
72 is restricted to move within the space 55 of the restriction
unit. An operator can directly plug the conductive wire 90 into the
cavity 11. The second section 72 of the metal leaf spring presses
the conductive wire 90 against restriction unit. The contact plate
60 has a first end 61 and a second end 62. The switch pushbutton 20
can selectively control the conductive component 30 into electrical
contact with the second end 62 or separation from the second end
62. The structure of the switch wire connection device of the
present invention is obviously different from the conventional
device in use and operational form. [0036] 2. Especially, according
to the conventional device, it is necessary to tighten or untighten
the screw for locking or unlocking the wiring circuit or the
conductive wire. This is quite troublesome. In addition, when the
screw is in a loosened state, the screw is often deflected so that
an operator can hardly aim the tool at the screw to drive the screw
for locking the conductive wire with the electrical contact. In
addition, in the conventional device, an .alpha.-shaped metal leaf
spring is applied to the insulation case. The insulation case and
the electrical contact are respectively formed with guide channels
and guide ribs in cooperation with the spring. Such structure is
relatively complicated so that the manufacturing cost is increased
and the volume of the case is enlarged. Moreover, the vibration
caused by the operation of the machine or the equipment will lead
to loosening of the screw. As a result, the conductive wire is apt
to loosen and detach from the case. The present invention overcomes
all the above shortcomings of the conventional device. [0037] 3.
The electrical contact 40 has higher rigidity or hardness and has
good electrical conductivity so that the electrical contact is able
to help in fixing the metal leaf spring 70 and guiding the metal
leaf spring 70 to move a true path. In addition, the restriction
unit 50 serves to correspondingly receive the metal leaf spring 70
and the conductive wire 90. This facilitates the operation of an
operator. In the conventional device, the bare metal end of the
conductive wire often thrusts and damages the case and the metal
leaf spring often deflects or swings within the interior of the
case to scrape and break the case. In addition, the conductive wire
can be hardly securely held in the case. The present invention
overcomes all the above shortcomings of the conventional
device.
[0038] In conclusion, the switch wire connection device of the
present invention is effective and different from the conventional
device in space form. The switch wire connection device of the
present invention is inventive, greatly advanced and advantageous
over the conventional device.
[0039] The above embodiments are only used to illustrate the
present invention, not intended to limit the scope thereof. Many
modifications of the above embodiments can be made without
departing from the spirit of the present invention.
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